An ideal gas has molecules with $5\; degrees$ of freedom. The ratio of specific heats at constant pressure $(C_p)$ and at constant volume $(C_v)$ is :

Question

$\begin{array}{1 1}(1)\; 6\\ (2)\; \frac{7}{2} \\ (3) \; \frac{5}{2} \\ (4)\; \frac{7}{5}\end{array} $